130 	};

   130 	};

   131 

   131 

   132 	// difference

   132 	// difference

   133 	friend Vector operator-(const Vector &a, const Vector &b)

   133 	friend Vector operator-(const Vector &a, const Vector &b)

   134 	{

   134 	{

   136 		return Vector(a.x - b.x, a.y - b.y, a.z - b.z);

   136 		return Vector(a.x - b.x, a.y - b.y, a.z - b.z);

   137 #else

   137 #else

   138 		return Vector(msub(a.mf4, b.mf4));

   139 		return Vector(msub(a.mf4, b.mf4));

   139 #endif

   140 #endif

   140 	};

   141 	};

   141 

   142 

   142 	// dot product

   143 	// dot product